O.M. Stewart Colloquium Series

Monday, October 9, 2017 4:00pm

Physics Library, Room 223A, Physics Building

Departments: 

Prof. Zhigang Chen, San Francisco State University

Prof. Zhigang Chen, San Francisco State University, presents, "Novel Phenomena in Graphene Photonics," Monday, Oct. 9 at 4:00 p.m. Refreshments will be served at 3:30 p.m.

Photonic graphene, the photonic analog of graphene constructed with waveguide arrays arranged in honeycomb lattice (HCL) geometry, has provided a powerful platform to emulate graphene physics while discovering new phenomena that would otherwise be inaccessible in real graphene. In recent studies, artificial HCLs have been successfully employed to investigate a variety of fundamental phenomena such as strong sublattice symmetry breaking, strain-induced pseudomagnetic fields, Berry curvature effects and photonic topological insulators. In this talk, I will discuss some of our recent work based on photonic graphene, including unconventional edge states, the pseudospin-mediated vortex generation and topological charge flipping, the Aharonov-Bohm-like interferences, and valley Bloch oscillations and Landau-Zener tunneling in photonic graphene that illustrates the important influence of the lattice geometry and wavepacket dynamics at Dirac points.